/Engine/Source/Editor/UnrealEd/Public/Kismet2/KismetReinstanceUtilities.h
Batch replaces a mapping of one or more classes to their new class
static void BatchReplaceInstancesOfClass ( const [TMap](API\Runtime\Core\Containers\TMap)< [UClass](API\Runtime\CoreUObject\UObject\UClass) *, [UClass](API\Runtime\CoreUObject\UObject\UClass) * > & InOldToNewClassMap, const [FReplaceInstancesOfClassParameters](API\Editor\UnrealEd\Kismet2\FReplaceInstancesOfClassParamete-) & Params )